define volume and pressure correction
Answers
Answer:
= Total volume — Effective volume. i.e., correct volume(V – b) (b) Pressure correction: The pressure of a gas is due to the hits of the molecules on the walls of the containing vessel. The attractive force between the molecules comes into play when the molecules are brought close together by compressing the gas.
Volume correction: At higher pressure, the volume is much reduced and at this state the volume of gas molecules no longer remains negligible in comparison with the total volume V occupied by the gas. Thus the free space available for motion of molecules is reduced. If v be the volume of the molecules at rest, effective volume when they are in motion must be greater. It has been calculated to be approximately four times the actual volume of the molecules.
Pressure correction: The pressure of a gas is due to the hits of the molecules on the walls of the containing vessel. The attractive force between the molecules comes into play when the molecules are brought close together by compressing the gas. A molecule in the body of the gas is attracted in all the directions when forces acting in opposite directions cancel out, but a molecule, the boundary of the gas is subjected to an inward pull due to unbalanced molecular attraction.